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BooHoo - Trim Tab Alignment...

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Matt Dralle
Site Admin

Joined: 08 Nov 2005
Posts: 25781
Location: Livermore CA USA

Posted: Tue Aug 05, 2008 11:56 am Post subject: BooHoo - Trim Tab Alignment...

Listers,



Well, the trim tab came out perfect and I'm really pleased with the 

mating to the Elevator.  That being said, I'm less than pleased with 

the for/aft alignment of the Trim Tab.  The Trim Tab hangs past the 

Elevator trailing edge by about 1/8" of an inch.  It is 1/8" along 

the whole distance of the Trim Tab.  In looking at the cause, it 

appears that the skins are all cut such that you are suppose to use 

the roundy part of the hinge and not the square cutout when aligning 

the hinge for drilling.  This would account for 1/16" on each side 

and would add up to the 1/8" overhang I'm seeing.  Grrrrrr....



What should I do, fellow builders?  I could drill out all the rivets 

and use a new hinge, and I'm certainly not opposed to that.  But am I 

making too big a deal out of the whole thing?  Or is everyone gonna 

look at it forever and go, "Hey, how come your trim take is too long?"  



Bummed Out in Livermore



Matt

RV-8 #82880

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Matt Dralle
Matronics Email List Administrator

timb

Joined: 16 Apr 2008
Posts: 77
Location: Frankston, Texas

Posted: Tue Aug 05, 2008 12:30 pm Post subject: BooHoo - Trim Tab Alignment...

Hi Bummed out in Livermore,



[quote] --

_________________
Tim Bryan
RV-6 Flying
N616TB

gyoung

Joined: 09 Jan 2006
Posts: 211
Location: Republic of Texas

Posted: Tue Aug 05, 2008 1:20 pm Post subject: BooHoo - Trim Tab Alignment...

Are you sure you've got the right size pin in there? The loops don't look

like they align right. After that, just set it aside until the end of the

project and then see how you feel about it. It's pretty minor and your F-it

factor changes over time;-)



Regards,

Greg Young

 



[quote] --

n1cxo320(at)salidaco.com
Guest

Posted: Tue Aug 05, 2008 3:35 pm Post subject: BooHoo - Trim Tab Alignment...

That's so minor that you are the only one that will ever notice it. 

Functionally it makes no difference whatever. Keep it as is, continue 

building and if it really bugs you change it after you get the plane in the 

air....some things are not worth fretting about, and this seems to one of 

them.

ronburnett(at)charter.net
Guest

Posted: Tue Aug 05, 2008 4:24 pm Post subject: BooHoo - Trim Tab Alignment...

Matt,

You did an excellent job.  I've redone several things on my RV-6A QB and am still not flying after 8 years.  As I tell my friends, I strain at knats and swallow camels.

I would press on with the next step.

Ron Burnett

---- Matt Dralle <dralle(at)matronics.com> wrote: 



=============



Listers,



Well, the trim tab came out perfect and I'm really pleased with the 

mating to the Elevator.  That being said, I'm less than pleased with 

the for/aft alignment of the Trim Tab.  The Trim Tab hangs past the 

Elevator trailing edge by about 1/8" of an inch.  It is 1/8" along 

the whole distance of the Trim Tab.  In looking at the cause, it 

appears that the skins are all cut such that you are suppose to use 

the roundy part of the hinge and not the square cutout when aligning 

the hinge for drilling.  This would account for 1/16" on each side 

and would add up to the 1/8" overhang I'm seeing.  Grrrrrr....



What should I do, fellow builders?  I could drill out all the rivets 

and use a new hinge, and I'm certainly not opposed to that.  But am I 

making too big a deal out of the whole thing?  Or is everyone gonna 

look at it forever and go, "Hey, how come your trim take is too long?"  



Bummed Out in Livermore



Matt

RV-8 #82880

aurbo(at)ak.net
Guest

Posted: Tue Aug 05, 2008 4:34 pm Post subject: BooHoo - Trim Tab Alignment...

Matt,

Looks good. Don't dwell on the small stuff you will never get done.



Mike Ice

RV-9, DAR inspection this weekend, test flight soon after



---

jsflyrv(at)verizon.net
Guest

Posted: Tue Aug 05, 2008 5:21 pm Post subject: BooHoo - Trim Tab Alignment...

Hi Matt how you doing?

BTW the trim is very seldom aligned perfectly when you are parked so  

most likely we would

have never known except now you have told us. 

Jerry



Matt Dralle wrote:



 	  Quote: 	
		  

 Listers,



 Well, the trim tab came out perfect and I'm really pleased with the 

 mating to the Elevator.  That being said, I'm less than pleased with 

 the for/aft alignment of the Trim Tab.  The Trim Tab hangs past the 

 Elevator trailing edge by about 1/8" of an inch.  It is 1/8" along the 

 whole distance of the Trim Tab.  In looking at the cause, it appears 

 that the skins are all cut such that you are suppose to use the roundy 

 part of the hinge and not the square cutout when aligning the hinge 

 for drilling.  This would account for 1/16" on each side and would add 

 up to the 1/8" overhang I'm seeing.  Grrrrrr....



 What should I do, fellow builders?  I could drill out all the rivets 

 and use a new hinge, and I'm certainly not opposed to that.  But am I 

 making too big a deal out of the whole thing?  Or is everyone gonna 

 look at it forever and go, "Hey, how come your trim take is too 

 long?"  



 Bummed Out in Livermore



 Matt

 RV-8 #82880 

 ------------------------------------------------------------------------

 ------------------------------------------------------------------------

 ------------------------------------------------------------------------

acepilot(at)bloomer.net
Guest

Posted: Tue Aug 05, 2008 5:48 pm Post subject: BooHoo - Trim Tab Alignment...

cecilth(at)juno.com
Guest

Posted: Wed Aug 06, 2008 10:10 am Post subject: BooHoo - Trim Tab Alignment...

I would print on it in small print:

"If you noticed this little booboo, keep it to yourself"

Cecil

On Tue, 05 Aug 2008 12:55:33 -0700 Matt Dralle <dralle(at)matronics.com>

writes:

 	  Quote: 	
		   

 Listers,

 

 Well, the trim tab came out perfect and I'm really pleased with the 

 mating to the Elevator.  That being said, I'm less than pleased with 

 

 the for/aft alignment of the Trim Tab.  The Trim Tab hangs past the 

 Elevator trailing edge by about 1/8" of an inch.  It is 1/8" along 

 the whole distance of the Trim Tab.  In looking at the cause, it 

 appears that the skins are all cut such that you are suppose to use 

 the roundy part of the hinge and not the square cutout when aligning 

 

 the hinge for drilling.  This would account for 1/16" on each side 

 and would add up to the 1/8" overhang I'm seeing.  Grrrrrr....

 

 What should I do, fellow builders?  I could drill out all the rivets 

 

 and use a new hinge, and I'm certainly not opposed to that.  But am 

 I 

 making too big a deal out of the whole thing?  Or is everyone gonna 

 look at it forever and go, "Hey, how come your trim take is too 

 long?"  

 

 Bummed Out in Livermore

 

 Matt

 RV-8 #82880


	


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Matt Dralle
Site Admin

Joined: 08 Nov 2005
Posts: 25781
Location: Livermore CA USA

Posted: Wed Aug 06, 2008 11:00 am Post subject: Re: BooHoo - Trim Tab Alignment...

Hey guys, thanks for all the great feedback.  I think I'll just set it aside for now and fry some bigger fish, and then come back to it later and see how I feel about it.  Jerry's comment about the tab never being aligned very often sitting on the ramp made some good sense.  Then again, on picture day....  



Thanks!



Matt

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Matt Dralle
Matronics Email List Administrator

Matt Dralle
Site Admin

Joined: 08 Nov 2005
Posts: 25781
Location: Livermore CA USA

Posted: Sat Aug 09, 2008 5:09 pm Post subject: BooHoo - Trim Tab Alignment...

Dear Listers,



Thanks to everyone for all the great feedback on my trim tab 

woes.  The more I looked at the 1/8" over hang of the trim tab, the 

more I couldn't stand it!  So I ordered up a new hinge which came 

today.  Drilling out the rivets wasn't too bad.  I used a nice 

straight piece of wood taped to the trailing edge of the Elevator as 

a reference, and then redrilled the new hinge.  Attached is a 

"before" and "after" shot.  Ah, much better!  Now I can sleep at 

night.  All and all it was pretty easy.



BTW, I picked up a small "air brush" by Badger this afternoon at a 

local craft store call Richards.  It has a little glass bulb to hold 

the paint and with an adapter, hooked right up to my air 

compressor.  Three drinking straws full of Variprime plus three 

straws full of activator was all I needed in the little air brush to 

very nicely prime the two pieces of replacement hinge.  Clean up was 

easy and fast.  Great for those "one-off" priming jobs.  Just a 

little tip from your Uncle Matt...  



So, just to set the record straight, none of you guys will now be 

able to come up to me and point and laugh when you see my trim tab alignment!!



Best,



Matt Dralle

RV-8 #82880



At 12:55 PM 8/5/2008, Matt Dralle wrote:



 	  Quote: 	
		  Listers,



Well, the trim tab came out perfect and I'm really pleased with the 

mating to the Elevator.  That being said, I'm less than pleased with 

the for/aft alignment of the Trim Tab.  The Trim Tab hangs past the 

Elevator trailing edge by about 1/8" of an inch.  It is 1/8" along 

the whole distance of the Trim Tab.  In looking at the cause, it 

appears that the skins are all cut such that you are suppose to use 

the roundy part of the hinge and not the square cutout when aligning 

the hinge for drilling.  This would account for 1/16" on each side 

and would add up to the 1/8" overhang I'm seeing.  Grrrrrr....



What should I do, fellow builders?  I could drill out all the rivets 

and use a new hinge, and I'm certainly not opposed to that.  But am 

I making too big a deal out of the whole thing?  Or is everyone 

gonna look at it forever and go, "Hey, how come your trim take is 

too long?"  



Bummed Out in Livermore



Matt

RV-8 #82880


	


Matt G Dralle | Matronics | PO Box 347 | Livermore | CA | 94551

925-606-1001 V | 925-606-6281 F | dralle(at)matronics.com Email

http://www.matronics.com/ WWW | Featuring Products For Aircraft

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